312265 has 12 divisors (see below), whose sum is σ = 397764. Its totient is φ = 235296.

The previous prime is 312253. The next prime is 312269. The reversal of 312265 is 562213.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 207936 + 104329 = 456^2 + 323^2 .

It is not a de Polignac number, because 312265 - 2⁵ = 312233 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (19).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (312269) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1719 + ... + 1891.

It is an arithmetic number, because the mean of its divisors is an integer number (33147).

2³¹²²⁶⁵ is an apocalyptic number.

It is an amenable number.

312265 is a deficient number, since it is larger than the sum of its proper divisors (85499).

312265 is a wasteful number, since it uses less digits than its factorization.

312265 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 216 (or 197 counting only the distinct ones).

The product of its digits is 360, while the sum is 19.

The square root of 312265 is about 558.8067644544. The cubic root of 312265 is about 67.8434257988.

Adding to 312265 its reverse (562213), we get a palindrome (874478).

The spelling of 312265 in words is "three hundred twelve thousand, two hundred sixty-five".